EP 1135858 A1 20010926 - BACKLIGHTING FOR COMPUTER KEYBOARD
Title (en)
BACKLIGHTING FOR COMPUTER KEYBOARD
Title (de)
HINTEGRUNDBELEUCHTUNG FÜR RECHNERTASTATUR
Title (fr)
ÉCLAIRAGE EN ARRIÈRE-PLAN DE CLAVIERS D'ORDINATEUR
Publication
Application
Priority
- US 9927065 W 19991112
- US 10831098 P 19981113
Abstract (en)
[origin: US6322229B1] Embodiments of a peripheral backlighting system for keyboards are shown and described, which include one or more light-emitting panels exterior to the keyswitches of the keyboard. The panels are preferably electroluminescent material and surround at least two sides, and preferably all sides, of the stem of a keyswitch or the space in which the stem slides up and down during use. Alternatively, the electroluminescent panel(s) may extend substantially continuously between and underneath a plurality of keyswitches. The panels extend closely adjacent to the stem or stem path, or under the keyswitch, to be as far under the key cap as possible without extending into the stem or cap of the keyswitch. The EL panels are preferably powered by the computer keyboard port, via voltage inverters. Preferably, the keyswitch is translucent or partially translucent, and the base plate over the EL panels, if any, is at least partially translucent or transparent. This way, the light from the light-emitting panels radiates upward through, and preferably around the outer surface of, the translucent keycaps, rather than up through an aperture or lightpipe in the center of the keycaps.
IPC 1-7
H03K 17/94; H03M 11/00; H01H 9/26; H01H 9/00; B32B 3/00; B32B 5/16; B32B 7/14
IPC 8 full level
G06F 3/02 (2006.01); G05G 1/10 (2006.01); H01H 13/02 (2006.01); H01H 13/14 (2006.01); H01H 13/702 (2006.01)
CPC (source: EP KR US)
G05G 1/105 (2013.01 - EP US); G06F 3/02 (2013.01 - KR); H01H 13/702 (2013.01 - EP US); H01H 2219/018 (2013.01 - EP US); H01H 2221/07 (2013.01 - EP US); H01H 2223/0345 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0030257 A1 20000525; AT E398857 T1 20080715; AU 1625600 A 20000605; CN 101064221 A 20071031; CN 1258705 C 20060607; CN 1326616 A 20011212; DE 69938936 D1 20080731; EP 1135858 A1 20010926; EP 1135858 A4 20030625; EP 1135858 B1 20080618; HK 1040840 A1 20020621; JP 2004500682 A 20040108; KR 100706324 B1 20070413; KR 20010112219 A 20011220; US 6322229 B1 20011127
DOCDB simple family (application)
US 9927065 W 19991112; AT 99958994 T 19991112; AU 1625600 A 19991112; CN 200610073558 A 19991112; CN 99813239 A 19991112; DE 69938936 T 19991112; EP 99958994 A 19991112; HK 02102061 A 20020318; JP 2000583163 A 19991112; KR 20017006093 A 20010514; US 43984699 A 19991112